Electron acceptors for energy generation in microbial fuel cells fed with wastewaters: A mini-review

He, Chuan-Shu; Mu, Zhe-Xuan; Yang, Hou-Yun; Wang, Yazhou; Mu, Yang; Yu, Han‐Qing

doi:10.1016/j.chemosphere.2015.03.059

Cited by 126 publications

(42 citation statements)

References 71 publications

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“…The concentration of electron acceptors determines power generation in MFCs, because electron acceptors can reduce the potential losses on the cathode (Du et al, 2007;He et al, 2015). Oxygen is the most commonly used electron acceptor in MFCs for the cathodic reaction.…”

Section: Optimization Of Operational Conditionsmentioning

confidence: 99%

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Sun

Zhuang

et al. 2016

Journal of Environmental Sciences

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Section: Optimization Of Operational Conditionsmentioning

confidence: 99%

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Sun

Zhuang

et al. 2016

Journal of Environmental Sciences

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“…[1][2][3][4][5][6] Shewanella oneidensis, a well-studied exoelectrogen, is capable of transferring electrons extracellularly through its metal-reducing (Mtr) pathway, 7-9 being widely studied for MFC performance 10 . However, the wild-type (WT) S. oneidensis can only use limited spectrum of carbon sources such as lactate and pyruvate, while sugars, the most abundant composition of biomass, could not be utilized by WT S. oneidensis owing to its incomplete sugar utilization pathways.…”

Section: Introductionmentioning

confidence: 99%

Engineering Electrode-Attached Microbial Consortia for High-Performance Xylose-Fed Microbial Fuel Cell

Yang

et al. 2015

ACS Catal.

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Microbial fuel cell (MFC) is a promising technology for energy harvesting from biomass, however, reported MFCs with wild-type or biologically modified exoelectrogenic bacteria such as Shewanella oneidensis often exhibited poor performance in generating electricity from sugars. Herein, a synthetic fermenter-exoelectrogen (Escherichia coli-S. oneidensis) microbial consortium was developed to expand the spectrum of carbon sources for MFC through establishing a highly electroactive anodic biofilm by rationally tuning its microbial community profile to favor efficient electron transfer. Specifically, a synthetic riboflavin pathway from Bacillus subtilis was incorporated into E. coli to overproduce flavins to facilitate flavin-mediated electron transfer, and a highly hydrophobic S. oneidensis strain CP2-1-S1 was adopted as the exoelectrogen to increase its adhesion to the carbon electrode. The highly hydrophobic interactions between S. oneidensis and the anode along with the overproduced flavins (increased from 3.3 µM to 115.2 µM) by the recombinant E. coli provided a definite advantage for S. oneidensis over E. coli in the attachment to the anode surface. Compared with the structure of the wild-type community immobilized on the anode, the cell number of S. oneidensis increased by ~3 times, while the cell number of E. coli decreased by 93.3% in the engineered electrode-attached community. Such rationally engineered anodic biofilm with the tuned microbial community profile (the percentage of S.oneidensis cells in the anodic biofilm increased from 48.2% to 98.2%) showed a much higher catalytic current (from 0.19 to 1.84 A/m 2 at 0 V vs. SHE). The xylose-fed MFC inoculated with our engineered microbial consortium generated a maximum power density of 728.6 mW/m 2 , which was 6.8 times higher than that inoculated with wild-type co-culture (92.8 mW/m 2 ).

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“…In the recent years, He et al (2017), Kumar et al (2016), Hernandez-Fernandez et al (2015), He et al (2015), and Solanki et al (2013) provided detailed and prolific reviews with thorough implications of microbial fuel cell (MFC) for wastewater treatment, bioenergy production, azo dye treatment, selection of electron acceptors, and exoelectrogens transfer, respectively. The concept of exoelectrogens of two dissimilatory metal reducing genera as electroactive bacteria (e.g., genomics, proteomics, and metabolomics of nanowire-generating Shewanella and Geobacter spp.…”

Section: Glimpse Of Microbial Fuel Cellsmentioning

confidence: 99%

“…In fact, there were at least several mechanisms in levels of genomics and proteomics for biofilm formation, direct electron transfer, mediator electron transport, and direct interspecies electron transfer dealing with performance of power generation in MFCs (Kumar et al 2016). Regarding (bio)cathode, selecting appropriate electron acceptor could significantly attenuate the potential loss present on the cathode, effectively augmenting power generation in MFCs (He et al 2015). Moreover, comparative assessment upon various electron acceptors popularly used in MFCs was also identified.…”

Section: Introductionmentioning

confidence: 99%

Electron transport phenomena of electroactive bacteria in microbial fuel cells: a review of Proteus hauseri

Hsueh

Chen

2017

Bioresour. Bioprocess.

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This review tended to decipher the expression of electron transfer capability (e.g., biofilm formation, electron shuttles, swarming motility, dye decolorization, bioelectricity generation) to microbial fuel cells (MFCs). As mixed culture were known to perform better than pure microbial cultures for optimal expression of electrochemically stable activities to pollutant degradation and bioenergy recycling, Proteus hauseri isolated as a "keystone species" to maintain such ecologically stable potential for power generation in MFCs was characterized. P. hauseri expressed outstanding performance of electron transfer (ET)-associated characteristics [e.g., reductive decolorization (RD) and bioelectricity generation (BG)] for electrochemically steered bioremediation even though it is not a nanowire-generating bacterium. This review tended to uncover taxonomic classification, genetic or genomic characteristics, enzymatic functions, and bioelectricity-generating capabilities of Proteus spp. with perspectives for electrochemical practicability. As a matter of fact, using MFCs as a tool to evaluate ET capabilities, dye decolorizer(s) could clearly express excellent performance of simultaneous bioelectricity generation and reductive decolorization (SBG and RD) due to feedback catalysis of residual decolorized metabolites (DMs) as electron shuttles (ESs). Moreover, the presence of reduced intermediates of nitroaromatics or DMs as ESs could synergistically augment efficiency of reductive decolorization and power generation. With swarming mobility, P. hauseri could own significant biofilm-forming capability to sustain ecologically stable consortia for RD and BG. This mini-review evidently provided lost episodes of great significance about bioenergysteered applications in myriads of fields (e.g., biodegradation, biorefinery, and electro-fermentation). Keywords

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Electron acceptors for energy generation in microbial fuel cells fed with wastewaters: A mini-review

Cited by 126 publications

References 71 publications

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Performance and recent improvement in microbial fuel cells for simultaneous carbon and nitrogen removal: A review

Engineering Electrode-Attached Microbial Consortia for High-Performance Xylose-Fed Microbial Fuel Cell

Electron transport phenomena of electroactive bacteria in microbial fuel cells: a review of Proteus hauseri

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